Phone. It was a phone interview. Followed by video interview then final with market leader. Be ready to discuss your sales methods. Pretty relaxed and straight forward questions. Typical sales questions.
I applied through an employee referral. I interviewed at Qualtrics in Feb 2015
Interview
There was a phone conversation then from there was a skype session with several of the managers. It was chill. The offer and process went quickly as I knew the next day I was getting hired.